AirEx Technologies
To combat fuel poverty and climate change with cutting-edge technology that creates warm, healthy homes for all.
32 employees · est. 2016 · London, United Kingdom
Rensair
HVAC: Hacked. Cutting carbon, costs and pollutants with the world’s first certified air quality ecosystem
20 employees · est. 2020 · London, United Kingdom
AirEx Technologies is the older company (2016 vs 2020).
Side-by-Side Comparison
| Metric | AirEx Technologies | Rensair |
|---|---|---|
| Founded | ||
| Founded | 2016 older | 2020 |
| Headquarters | ||
| Headquarters | London, United Kingdom | London, United Kingdom |
| Employees | ||
| Employees | 32 | 20 |
| Industry | ||
| Industry | Cloud Infrastructure, Consumer Goods, Energy Efficiency | Health Care, Manufacturing |
| Funding Stage | ||
| Funding Stage | Series A | Series A |
| Total Funding | ||
| Total Funding | $3.20M | $7.00M |
| Funding Rounds | ||
| Funding Rounds | 4 | 2 |
| Services | ||
| Services | Smart Air Brick Technology, Floorvent Installation, Energy Efficiency Consultation, Ventilation System Design, Damp and Humidity Control | HVAC technology optimization, Commercial air filtration solutions, Energy-efficient ventilation systems, Indoor air quality improvement |
| Target Customers | ||
| Target Customers | Social Housing Providers, Local Authorities, ECO Installers, Retrofit Contractors, Private Landlords, Homeowners | Commercial offices, Universities, Hospitals and healthcare facilities, Transportation providers |
| Taxonomy | ||
| Taxonomy | Climate Tech, Energy Efficiency, Fuel Poverty Alleviation, Smart Home Solutions, Retrofit Ventilation Systems, Air Quality Management, Thermal Comfort, Atmospheric Sensors, Cloud Algorithms, Low-Carbon Innovation, Cleantech Development, Smart Ventilation Control, Indoor Air Quality, Home Energy Management, Sustainable Building Technologies | Air Purification, Clean Air, HEPA, UVC, Portable, Indoor Air Quality, Ventilation, Smart Buildings, Decarbonisation, Energy Efficiency, Net Zero Target, ESG Goals, Green Tech |
| Website | ||
| Website | airex.tech | rensair.com |
About AirEx Technologies
AirEx Technologies, founded in 2016 and headquartered in the United Kingdom, is an innovative player in the climate tech sector. Their slogan, "To combat fuel poverty and climate change with cutting-edge technology that creates warm, healthy homes for all," reflects their mission-driven focus. Speci...
About Rensair
Rensair is a UK-based startup established in 2020 that aims to revolutionize the HVAC industry with the world's first certified air quality ecosystem. The company's slogan "HVAC: Hacked. Cutting carbon, costs and pollutants with the world’s first certified air quality ecosystem" succinctly captures...
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Compiled from the BounceWatch company index. We last looked at AirEx Technologies on 18 Aug 2025, and Rensair on 14 Apr 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.